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``lower``

doc/filters/lower.rst

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lower

The lower filter converts a value to lowercase:

.. code-block:: twig

{{ 'WELCOME'|lower }}

{# outputs 'welcome' #}

.. note::

Internally, Twig uses the PHP `mb_strtolower`_ function.

.. _mb_strtolower: https://www.php.net/manual/fr/function.mb-strtolower.php